1,2,4-Trichlorobenzene
Waldorf
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 5 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 5 ppb
The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hormone disruption.
EPA Maximum Contaminant
Level (MCL) 70 ppb
The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-06-12 | 0080049_14_05416 | ND |
| 2015-08-19 | E16000687001 | ND |
| 2016-05-24 | E16004456001 | ND |
| 2016-05-24 | E16004461001 | ND |
| 2016-05-24 | E16004451001 | ND |
| 2016-08-10 | E17000586003 | ND |
| 2016-08-24 | 27608_000001 | ND |
| 2016-10-24 | E17001823005 | ND |
| 2016-10-24 | E17001823007 | ND |
| 2016-10-24 | E17001823001 | ND |
| 2017-06-28 | E17005216006 | ND |
| 2019-04-04 | 3026085001 | ND |
| 2019-04-19 | E19003516004 | ND |
| 2019-06-13 | E19004319004 | ND |
| 2019-06-14 | E19004334001 | ND |
| 2019-10-08 | E20001383001 | ND |